perGB

perGB is a unit-price label used to express the cost associated with one gigabyte of data, storage capacity, or data transfer. In cloud computing and hosting, it is commonly applied as price per gigabyte per month for stored data (per GB-month) and as price per gigabyte for data egress or transfer (per GB). Consumer mobile data plans and memory cards also quote prices in per-GB terms.

The term is used across several pricing contexts. For storage, perGB-month is the standard metric, representing the ongoing cost to maintain a certain amount of data. For data transfer, per-GB charges apply to the amount of data moved, often after any included allowances. Some plans combine both storage and transfer components, each with its own perGB rate. Tiered pricing can alter the effective per-GB cost as usage grows, making the average price different from the nominal rate and sometimes requiring blended calculations.

Calculation and interpretation can involve units and measurement methods. Price per GB = total price / total gigabytes used or provisioned. Be aware of potential differences between decimal gigabytes (GB) and binary gibibytes (GiB), as some providers bill in one unit while marketing in another. Rounding rules, minimums, overage penalties, and regional variations can also affect the realized cost per GB.

Example: a storage plan at $0.023 per GB-month costs $2.30 monthly for 100 GB. An egress rate of $0.08 per GB would charge $4.00 for 50 GB transferred. In software, perGB may appear as a variable in pricing models or API calculations.